[ImgBot] Optimize images

*Total -- 49.85kb -> 29.72kb (40.38%)

/app/public/img/redhat-logo-retina.png -- 15.62kb -> 7.85kb (49.76%)
/app/public/img/redhat-logo-dark-retina.png -- 14.92kb -> 7.94kb (46.8%)
/app/public/img/project_quay_logo.png -- 19.31kb -> 13.93kb (27.84%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp